unsigned char* macvdCamera::getFrame()
{
OSErr err;
int isUpdated = 0;
if (!vdgIsGrabbing(pVdg)) return NULL;
if (err = vdgIdle( pVdg, &isUpdated))
{
printf("could not grab frame\n");
return NULL;
}
if (isUpdated)
{
unsigned char *src = (unsigned char*)pDstData;
unsigned char *dest = buffer;
switch (colour) {
case true: {
uyvy2rgb(width,height,src,dest);
break;
}
case false: {
uyvy2gray(width,height,src,dest);
break;
}
}
return buffer;
}
return NULL;
}
unsigned char* V4LinuxCamera::getFrame() {
if (cameraID==-1) return NULL;
int frame = 0;
v4l_mmap.frame = frame;
ioctl(cameraID, VIDIOCSYNC, &frame);
if(ioctl(cameraID, VIDIOCMCAPTURE, &v4l_mmap)<0) {
stopCamera();
closeCamera();
return NULL;
}
camBuffer = camBuffer + v4l_buf.offsets[frame];
if (camBuffer==NULL) return NULL;
switch (colour) {
case false:
if (v4l_mmap.format==VIDEO_PALETTE_YUYV) yuyv2gray(this->width, this->height, camBuffer, buffer);
else if (v4l_mmap.format==VIDEO_PALETTE_UYVY) uyvy2gray(this->width, this->height, camBuffer, buffer);
else if (v4l_mmap.format==VIDEO_PALETTE_YUV420P) return camBuffer;
return buffer;
break;
case true:
//ccvt_420p_bgr24(width, height, camBuffer, buffer);
break;
}
return buffer;
}
unsigned char* V4Linux2Camera::getFrame() {
if (dev_handle<0) return NULL;
if (ioctl(dev_handle, VIDIOC_DQBUF, &v4l2_buf)<0) {
running = false;
return NULL;
}
unsigned char *raw_buffer = (unsigned char*)buffers[v4l2_buf.index].start;
if (raw_buffer==NULL) return NULL;
if(cfg->color) {
if (cfg->frame) {
if (pixelformat==V4L2_PIX_FMT_YUYV)
crop_yuyv2rgb(cfg->cam_width,raw_buffer,frm_buffer);
else if (pixelformat==V4L2_PIX_FMT_UYVY)
crop_uyvy2rgb(cfg->cam_width,raw_buffer,frm_buffer);
else if (pixelformat==V4L2_PIX_FMT_YUV420) { //TODO
} else if (pixelformat==V4L2_PIX_FMT_YUV410) { //TODO
} else if (pixelformat==V4L2_PIX_FMT_GREY)
crop_gray2rgb(cfg->cam_width,raw_buffer, frm_buffer);
else if ((pixelformat == V4L2_PIX_FMT_MJPEG) || (pixelformat == V4L2_PIX_FMT_JPEG)) {
int jpegSubsamp;
tjDecompressHeader2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, &cfg->cam_width, &cfg->cam_height, &jpegSubsamp);
tjDecompress2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, cam_buffer, cfg->cam_width, 0, cfg->cam_height, TJPF_RGB, TJFLAG_FASTDCT);
crop(cfg->cam_width, cfg->cam_height,cam_buffer,frm_buffer,3);
}
} else {
if (pixelformat==V4L2_PIX_FMT_YUYV)
yuyv2rgb(cfg->cam_width,cfg->cam_height,raw_buffer,cam_buffer);
else if (pixelformat==V4L2_PIX_FMT_UYVY)
uyvy2rgb(cfg->cam_width,cfg->cam_height,raw_buffer,cam_buffer);
else if (pixelformat==V4L2_PIX_FMT_YUV420) { //TODO
} else if (pixelformat==V4L2_PIX_FMT_YUV410) { //TODO
} else if (pixelformat==V4L2_PIX_FMT_GREY)
gray2rgb(cfg->cam_width,cfg->cam_height,raw_buffer,cam_buffer);
else if ((pixelformat == V4L2_PIX_FMT_MJPEG) || (pixelformat == V4L2_PIX_FMT_JPEG)) {
int jpegSubsamp;
tjDecompressHeader2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, &cfg->cam_width, &cfg->cam_height, &jpegSubsamp);
tjDecompress2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, cam_buffer, cfg->cam_width, 0, cfg->cam_height, TJPF_RGB, TJFLAG_FASTDCT);
}
}
} else {
if (cfg->frame) {
if (pixelformat==V4L2_PIX_FMT_YUYV)
crop_yuyv2gray(cfg->cam_width,raw_buffer,frm_buffer);
else if (pixelformat==V4L2_PIX_FMT_UYVY)
crop_uyvy2gray(cfg->cam_width,raw_buffer,frm_buffer);
else if (pixelformat==V4L2_PIX_FMT_YUV420)
crop(cfg->cam_width, cfg->cam_height,raw_buffer,frm_buffer,1);
else if (pixelformat==V4L2_PIX_FMT_YUV410)
crop(cfg->cam_width, cfg->cam_height,raw_buffer,frm_buffer,1);
else if (pixelformat==V4L2_PIX_FMT_GREY)
crop(cfg->cam_width, cfg->cam_height,raw_buffer,frm_buffer,1);
else if ((pixelformat == V4L2_PIX_FMT_MJPEG) || (pixelformat == V4L2_PIX_FMT_JPEG)) {
int jpegSubsamp;
tjDecompressHeader2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, &cfg->cam_width, &cfg->cam_height, &jpegSubsamp);
tjDecompress2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, cam_buffer, cfg->cam_width, 0, cfg->cam_height, TJPF_GRAY, TJFLAG_FASTDCT);
crop(cfg->cam_width, cfg->cam_height,cam_buffer,frm_buffer,1);
}
} else {
if (pixelformat==V4L2_PIX_FMT_YUYV) yuyv2gray(cfg->cam_width, cfg->cam_height, raw_buffer, cam_buffer);
else if (pixelformat==V4L2_PIX_FMT_UYVY) uyvy2gray(cfg->cam_width, cfg->cam_height, raw_buffer, cam_buffer);
else if (pixelformat==V4L2_PIX_FMT_YUV420) memcpy(cam_buffer,raw_buffer,cfg->cam_width*cfg->cam_height);
else if (pixelformat==V4L2_PIX_FMT_YUV410) memcpy(cam_buffer,raw_buffer,cfg->cam_width*cfg->cam_height);
//else if (pixelformat==V4L2_PIX_FMT_GREY) memcpy(cam_buffer,raw_buffer,cam_width*cam_height);
else if ((pixelformat == V4L2_PIX_FMT_MJPEG) || (pixelformat == V4L2_PIX_FMT_JPEG)) {
int jpegSubsamp;
tjDecompressHeader2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, &cfg->cam_width, &cfg->cam_height, &jpegSubsamp);
tjDecompress2(_jpegDecompressor, raw_buffer, v4l2_buf.bytesused, cam_buffer, cfg->cam_width, 0, cfg->cam_height, TJPF_GRAY, TJFLAG_FASTDCT);
}
}
}
if (-1 == ioctl (dev_handle, VIDIOC_QBUF, &v4l2_buf)) {
printf("cannot unqueue buffer: %s\n", strerror(errno));
return NULL;
}
if (cfg->frame) return frm_buffer;
else if ((!cfg->color) && (pixelformat==V4L2_PIX_FMT_GREY)) return raw_buffer;
else return cam_buffer;
}